In a trickling biological filter, the BOD value of the feed stream is S_0i = 500 mg/l with a feed flow of F = 10³ l/h. The effluent BOD value is desired to be S₀ = 10 mg/l. The following kinetic parameters for the biocatalysts are known: r_m = 20 mg/S/l .h and K_s = 200 mg S/l. The biofilm thickness is L = 0.1 mm. The cross-sectional area of the filter is A = 2 m² , and the biofilm surface area per unit volume of the bed is a = 500 cm² /cm³ . Assume that dissolved oxygen is the rate-limiting substrate and the diffusion coefficient of oxygen is D_O2 = 2 × 10^-5 cm² /s. Determine the required height of the bed. You can assume first-order bioreaction kinetics?

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TLS Online TPP Program

#Question id: 27323

#Section 5: Bioprocess Engineering and Process Biotechnology

In microbial cultivation experiment with cells having significant maintenance requirements, the measured  growth yield Y’ XS (G) and the true growth yield Y XS

TLS Online TPP Program

#Question id: 27324

#Section 5: Bioprocess Engineering and Process Biotechnology

During a batch culture experiment, the following data was obtained

What will be the product yield (g) per gram of substrate?

TLS Online TPP Program

#Question id: 27325

#Section 5: Bioprocess Engineering and Process Biotechnology

if the initial substrate concentration is 15 g/L and initial biomass concentration is 0.1 g/L. The substrate is then consumed completely and produces 6.4 g/L of biomass. The yield coefficient will be

TLS Online TPP Program

#Question id: 27326

#Section 5: Bioprocess Engineering and Process Biotechnology

The growth of a microorganism on glucose is described by the Monod model (µmax = 0.7 h¹ and Ks = 0.1 g L¹). If the initial biomass concentration in the batch fermenter is 0.1 g L¹, the minimum time required to triple the biomass concentration would be

TLS Online TPP Program

#Question id: 27327

#Section 5: Bioprocess Engineering and Process Biotechnology

The product formation kinetics of a biochemical process follows the model qp = au + B. In case of a = 0, the rate of product formation is

TLS Online TPP Program

#Question id: 27328

#Section 5: Bioprocess Engineering and Process Biotechnology

The unit of maintenance coefficient is